Near Earth objects (NEOs) are attractive targets for spacecraft missions with the purpose of obtaining greater insight to the nature of the original bodies from which the terrestrial planets formed, without having to visit the Main Belt itself. Greater knowledge of NEOs directly sheds light on the origin and evolution of the asteroid belt, the formation of planets, and the history of the solar system.
This report describes a search for NEOs that would be accessible for missions launching in 2020-2024. A broad trajectory search was done to find the best rendezvous and sample-return trajectories available to 7,030 asteroids. The search found 624 NEOs with spacecraft trajectories available in 2020-2040 and 345 NEOs with Earth-return trajectories available in the same period. These results clearly show that there is a wealth of mission targets available, representing a broad diversity of asteroid types.